public class VerticalTextView extends TextView{ final boolean topDown; public VerticalTextView(Context context, AttributeSet attrs){ super(context, attrs); final int gravity = getGravity(); if(Gravity.isVertical(gravity) && (gravity&Gravity.VERTICAL_GRAVITY_MASK) == Gravity.BOTTOM) { setGravity((gravity&Gravity.HORIZONTAL_GRAVITY_MASK) | Gravity.TOP); topDown = false; }else topDown = true; } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){ super.onMeasure(heightMeasureSpec, widthMeasureSpec); setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth()); } @Override protected void onDraw(Canvas canvas){ TextPaint textPaint = getPaint(); textPaint.setColor(getCurrentTextColor()); textPaint.drawableState = getDrawableState(); canvas.save(); if(topDown){ canvas.translate(getWidth(), 0); canvas.rotate(90); }else { canvas.translate(0, getHeight()); canvas.rotate(-90); } canvas.translate(getCompoundPaddingLeft(), getExtendedPaddingTop()); getLayout().draw(canvas); canvas.restore(); }}
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